Wikipedia:

Not to be confused with Elisha.

Elishah, or Eliseus (Hebrew: אֱלִישָׁה‎ ’Ělîšāh) was the son of Javan according to the Book of Genesis (10:4) as well as the mediaeval, rabbinic Book of Jasher (Hebrew transliteration: Sefer haYashar); he is said in Jasher to have been the ancestor of the "Almanim", possibly a reference to Germanic tribes (Alamanni). An older and more common traditions refers to him as a settler of Greece, particularly Elis in the Peloponese. The Greek Septuagint of Genesis 10 lists Elisa not only as the son of Javan, but also among the sons of Japheth, possibly a copyist's error.

Lusitanian mythology traditionally makes Elishah (under the name Lysias/Lísias) an ancestor and predecessor of Lusus (Elisha being older, having arrived accompanying his uncle Tubal founding Portalegre in 1900 BC under Iberian king Brigo), Lysias' own supposed tomb (in Portalegre) claiming that he was the first "cultivator" of Lusitania. Lusus' reign is traditionally placed in the sixteenth-fifteenth centuries BC, e.g., in the Livro Primeiro da Monarchia Lusitana. All this is debated; Lusus has also been described as coming before Lysias, who would thus be too late to be Elishah or vaguely at the same time, or even the same individual under different names. Lusus is sometimes called a son of Baccus and of the lineage of Lysias, or the other way around, or even a mere companion. The Portuguese orator and mythographer Father António Vieira (1608-1697) refers to Elishah (under his actual biblical name) as founder and eponym of Lisbon and Lusitania (when he came to the Iberia with his uncle Tubal), as well as the origin of the name of the mythological Elysium. Vieira also identified Elisha's biblical brother Tarshish as the founder of Tartesos in Andalucia, implying both would have come to Iberia with Tubal (though this isn't the only theory on the identity of Tarshish). Elishah in this Portuguese portrayal is identified with Bacchus' captain Lysias/Lísias, sometimes also with Lusus and Phoroneus and is referred as the founder of Portalegre and being buried at the Ermida de São Cristovão (Chapel of Saint Christopher) inside the town. A proposed resolution of these conflicting versions of the myth involves considering an early Lysias, Elishah (mythical founder of Portalegre in 1900 BC) and Lusus (having as mortal father king Siceleo of Iberia, grandson of Atlante/Atlas, founder of Atlantis, to be a possible descendant of Elishah, but possibly Bacchus being his real and divine father), and later lived another Lysias, son of Bacchus (who in this version is clearly the son of Semele who conquered Iberia, not the son of Jupiter and Io who conquered India or the son of Jupiter and Proserpina who was an agrarian and herding culture hero), who was of a different cast but with the similarity of name to the above was claimed by his father Bacchus to be their reincarnation to please the Lusitanians he subjected, becoming under his father the new separate king of the Lusitanians since Lusus.

Judean historian Flavius Josephus related the descendants of Elishah with the Aeolians, one of the ancestral branches of the Greeks.

Others have identified Elishah with Cypriots as in ancient times the island or part of it was known as Alashiya.